1 | /** |
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2 | * @file |
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3 | * |
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4 | * @ingroup lpc24xx_lcd |
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5 | * |
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6 | * @brief LCD support. |
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7 | */ |
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8 | |
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9 | /* |
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10 | * Copyright (c) 2010-2012 embedded brains GmbH. All rights reserved. |
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11 | * |
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12 | * embedded brains GmbH |
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13 | * Obere Lagerstr. 30 |
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14 | * 82178 Puchheim |
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15 | * Germany |
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16 | * <rtems@embedded-brains.de> |
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17 | * |
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18 | * The license and distribution terms for this file may be |
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19 | * found in the file LICENSE in this distribution or at |
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20 | * http://www.rtems.org/license/LICENSE. |
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21 | */ |
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22 | |
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23 | #include <assert.h> |
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24 | |
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25 | #include <bsp/lpc24xx.h> |
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26 | #include <bsp/lcd.h> |
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27 | #include <bsp/lpc-lcd.h> |
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28 | #include <bsp/utility.h> |
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29 | #include <bsp/system-clocks.h> |
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30 | |
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31 | #ifdef ARM_MULTILIB_ARCH_V4 |
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32 | #define LCD_ENABLE BSP_BIT32(0) |
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33 | #endif |
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34 | |
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35 | rtems_status_code lpc24xx_lcd_set_mode( |
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36 | lpc24xx_lcd_mode mode, |
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37 | const lpc24xx_pin_range *pins |
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38 | ) |
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39 | { |
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40 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
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41 | bool enable = false; |
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42 | |
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43 | switch (mode) { |
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44 | case LCD_MODE_STN_4_BIT: |
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45 | case LCD_MODE_STN_8_BIT: |
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46 | case LCD_MODE_STN_DUAL_PANEL_4_BIT: |
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47 | case LCD_MODE_STN_DUAL_PANEL_8_BIT: |
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48 | case LCD_MODE_TFT_12_BIT_4_4_4: |
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49 | case LCD_MODE_TFT_16_BIT_5_6_5: |
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50 | case LCD_MODE_TFT_16_BIT_1_5_5_5: |
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51 | case LCD_MODE_TFT_24_BIT: |
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52 | enable = true; |
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53 | break; |
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54 | case LCD_MODE_DISABLED: |
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55 | enable = false; |
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56 | break; |
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57 | default: |
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58 | sc = RTEMS_IO_ERROR; |
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59 | break; |
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60 | } |
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61 | |
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62 | if (sc == RTEMS_SUCCESSFUL) { |
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63 | if (enable) { |
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64 | sc = lpc24xx_module_enable(LPC24XX_MODULE_LCD, LPC24XX_MODULE_PCLK_DEFAULT); |
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65 | assert(sc == RTEMS_SUCCESSFUL); |
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66 | |
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67 | #ifdef ARM_MULTILIB_ARCH_V4 |
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68 | PINSEL11 = BSP_FLD32(mode, 1, 3) | LCD_ENABLE; |
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69 | #endif |
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70 | |
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71 | sc = lpc24xx_pin_config(pins, LPC24XX_PIN_SET_FUNCTION); |
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72 | assert(sc == RTEMS_SUCCESSFUL); |
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73 | } else { |
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74 | if (lpc24xx_lcd_current_mode() != LCD_MODE_DISABLED) { |
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75 | uint32_t lcd_ctrl = LCD_CTRL; |
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76 | |
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77 | /* Disable power */ |
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78 | lcd_ctrl &= ~BSP_BIT32(11); |
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79 | LCD_CTRL = lcd_ctrl; |
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80 | |
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81 | lpc24xx_micro_seconds_delay(100000); |
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82 | |
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83 | /* Disable all signals */ |
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84 | lcd_ctrl &= ~BSP_BIT32(0); |
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85 | LCD_CTRL = lcd_ctrl; |
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86 | } |
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87 | |
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88 | sc = lpc24xx_pin_config(pins, LPC24XX_PIN_SET_INPUT); |
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89 | assert(sc == RTEMS_SUCCESSFUL); |
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90 | |
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91 | #ifdef ARM_MULTILIB_ARCH_V4 |
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92 | PINSEL11 = 0; |
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93 | #endif |
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94 | |
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95 | sc = lpc24xx_module_disable(LPC24XX_MODULE_LCD); |
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96 | assert(sc == RTEMS_SUCCESSFUL); |
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97 | } |
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98 | } |
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99 | |
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100 | return sc; |
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101 | } |
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102 | |
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103 | lpc24xx_lcd_mode lpc24xx_lcd_current_mode(void) |
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104 | { |
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105 | #ifdef ARM_MULTILIB_ARCH_V4 |
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106 | uint32_t pinsel11 = PINSEL11; |
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107 | |
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108 | if ((PCONP & BSP_BIT32(20)) != 0 && (pinsel11 & LCD_ENABLE) != 0) { |
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109 | return BSP_FLD32GET(pinsel11, 1, 3); |
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110 | } else { |
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111 | return LCD_MODE_DISABLED; |
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112 | } |
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113 | #else |
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114 | volatile lpc17xx_scb *scb = &LPC17XX_SCB; |
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115 | |
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116 | if ((scb->pconp & LPC17XX_SCB_PCONP_LCD) != 0) { |
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117 | return LCD_CTRL & 0xae; |
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118 | } else { |
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119 | return LCD_MODE_DISABLED; |
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120 | } |
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121 | #endif |
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122 | } |
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